Golf ball
Abstract
An object of the present disclosure is to provide a golf ball having improved flight distance on driver shots and excellent spin performance on approach shots (particularly under the condition that there is grass between the golf ball and the club face) and on middle iron shots. The present disclosure provides a golf ball comprising a spherical core and a cover disposed outside the spherical core, wherein when a center hardness of the spherical core (Shore C hardness), hardnesses at 2.5 mm, 5 mm, 7.5 mm, 10 mm, 12.5 mm and 15 mm points from a center of the spherical core toward a surface of the spherical core (Shore C hardness), and a surface hardness of the spherical core (Shore C hardness) are represented by H0, H2.5, H5, H7.5, H10, H12.5, H15 and Hs respectively, the following relation is satisfied:(H2.5-H0)>(H12.5-H10)>(HS-H15).
Claims
exact text as granted — not AI-modified1 . A golf ball comprising a spherical core and a cover disposed outside the spherical core, wherein when a center hardness of the spherical core (Shore C hardness), hardnesses at 2.5 mm, 5 mm, 7.5 mm, 10 mm, 12.5 mm and 15 mm points from a center of the spherical core toward a surface of the spherical core (Shore C hardness), and a surface hardness of the spherical core (Shore C hardness) are represented by H 0 , H 2.5 , H 5 , H 7.5 , H 10 , H 12.5 , H 15 and H s respectively, the following relationships are satisfied:
(
H
2.5
-
H
0
)
>
(
H
12.5
-
H
10
)
>
(
H
s
-
H
15
)
and
80.2
≤
(
H
15
+
H
s
)
/
2
≤
8
5
.
2 . The golf ball according to claim 1 , wherein the following relationships are satisfied:
(
H
10
-
H
0
)
≥
7
and
0
≤
(
H
s
-
H
15
)
≤
5.
3 . The golf ball according to claim 1 , wherein the following relationship is satisfied:
(
H
2.5
+
H
5
+
H
7.5
+
H
10
)
/
4
≥
70.
4 . The golf ball according to claim 1 , wherein the following relationship is satisfied:
(
H
2.5
-
H
0
)
≥
5
.
5 . The golf ball according to claim 1 , wherein the following relationship is satisfied:
2
≤
(
H
12.5
-
H
10
)
≤
7
.
6 . The golf ball according to claim 1 , wherein the following relationship is satisfied:
0
<
(
H
2.5
-
H
0
)
-
(
H
12.5
-
H
10
)
≤
5
.
7 . The golf ball according to claim 1 , wherein the following relationship is satisfied:
0
<
(
H
12.5
-
H
10
)
-
(
H
s
-
H
15
)
≤
5
.
8 . The golf ball according to claim 1 , wherein the following relationship is satisfied:
(
H
10
-
H
0
)
/
(
H
s
-
H
15
)
≥
2
.
9 . The golf ball according to claim 1 , wherein the following relationship is satisfied:
1
5
≤
(
H
s
-
H
0
)
≤
2
5
.
10 . The golf ball according to claim 1 , wherein the following relationship is satisfied:
H
0
≥
60.
11 . The golf ball according to claim 1 , wherein the following relationships are satisfied:
(
H
5
-
H
2.5
)
≤
3
,
(
H
7.5
-
H
5
)
≤
3
and
(
H
10
-
H
7.5
)
≤
3.
12 . The golf ball according to claim 1 , wherein the golf ball comprises an intermediate layer between the spherical core and the cover, and the surface hardness of the spherical core (Shore C hardness), a surface hardness of the intermediate layer (Shore C hardness) and a surface hardness of the golf ball (Shore C hardness) satisfy the following relationship: (surface hardness of spherical core)<(surface hardness of intermediate layer)>(surface hardness of golf ball).
13 . The golf ball according to claim 1 , wherein the golf ball has a compression deformation amount of 2.80 mm or less measured by applying a load from 98 N as an initial load to 1275 N as a final load to the golf ball.
14 . The golf ball according to claim 12 , wherein the surface hardness of the intermediate layer ranges from 80 to 100 in Shore C hardness.
15 . The golf ball according to claim 12 , wherein the intermediate layer has a slab hardness ranging from 60 to 76 in Shore D hardness.
16 . The golf ball according to claim 12 , wherein the surface hardness of the golf ball ranges from 50 to 80 in Shore C hardness.
17 . The golf ball according to claim 12 , wherein the surface hardness of the spherical core ranges from 75 to 85 in Shore C hardness.
18 . The golf ball according to claim 12 , wherein the following relationships are satisfied: (H 10 −H 0 )≥7 and 0≤(H s −H 15 )≤5.
19 . The golf ball according to claim 12 , wherein the following relationship is satisfied:
(
H
2.5
+
H
5
+
H
7.5
+
H
10
)
/
4
≥
7
0
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